Green was not playing everyday before his injury, but it is not clear if there will be room for him on the roster before September expansion.
"I know it's the business, it's part of the game," Wheeler said. "I know that all these young pitchers can be used as trade bait, but I've been part of the rebuilding here. I'd like to see what happens."
Wheeler has been solid in his second major-league season with the Mets, posting a 3.48 ERA with 148 strikeouts and 65 walks in 152 2/3 innings of work.
Gonzalez, the team's 3rd-round draft choice in June's draft, has yet to allow a run as a professional, as he opened his career with 24 2/3 straight scoreless innings at the rookie level. He will finish his season with two starts for Aberdeen.
Machado is eligible to return Aug. 27, but he appears to be behind schedule at this point. The hope was that he would begin baseball activities by Sunday, but it appears unlikely. According to MASNSports.com, Showalter is expected to give an update with more details on Machado's timetable Saturday.
Castillo's contract begins in 2014, though it is not yet clear whether he is expected to appear in the majors this season. The deal is heavily backloaded, according to the report, with very little money paid out for the truncated 2014 season.
Though he expects to be in the majors when rosters expand Sept. 1,
"It's serviceable," Perez said. "I feel good. I'm still trying to build up the strength in it."
Perez has a 5.03 ERA in the majors this season, and is trying to work his way back from bone spurs in his ankle. He does not expect to undergo surgery to remove them, so he will have to manage the pain. He is currently on a rehab assignment at Class A Rancho Cucamonga, where he will make one more appearance next Friday.
According to the report, the Red Sox have nearly reached an agreement with the Cuban free agent on a six-year deal worth $72 million. That deal would top the $68 million contract Jose Abreu signed last year.